Fluid-motor.



PATENTE-D APR. 21, 1908.

J. B. FLETCHER.

FLUID MOTOR.

APPLICATION FILED JULY a1, 1906.

arwanl oz l/Wines a JOHN B. FLETCHER, .OF NEWPORT, KENTUCKY.

'rrurn iuo'roa.

Specification of Letters l-"atent.

Patented 21, 1908.

Application filed July 81, 1906. Serial No. 328,618.

T call whom away concern;

Be it knowmhat LJ HN B. FLETCHER, a citizen of theUnitedStates, residingat Newport, infthe countyof Campbell and State of Kentucky, haveinvented certain new and useful Improvements in Fluid-Motors, of whichthe following is a specification.

This invention relates to a fluid motor,

especially adapted to be driven by fluid under pressure.

The object of this invention is to provide a double acting piston withvalves and valve chambers arranged in the piston, head, the parts soconstructed that the valves are automatically'tripped near each end ofthe.

stroke by contact of the valves with tri s seated, and projected'from'the face of t 1e cylinder heads. The parts are so arranged thatfixed supply and exhaust pipes are attached at one end of the cylinder,the supply and discharge of the fluid into and from the chambered pistonhead from one end, is accomplished by means of telescopic pi estraveling with the piston but sliding wit iin the stationary pipes onthe outside head of the cylinder.

Various features of the invention are more fully set forth in thedescription of the accompanying drawings, forming a part of thisspecification, in which Figure 1 is a central longitudinal section ofthe cylinder and pipes, showing the piston and piston valves inelevation. Fig. 2 is an enlarged'central section of the cylinder, istonand valve. Fig. 3 is a section on ine as, at, Fig. 2. Fig. 4 is asection on line w, w, Fig. 2.

1 represents a cylinder. base supports for the same. I

3 represents the piston rod connected to the piston 5.

grepresents a stuffing-box for the piston r0 3.

6 represents the rack bar.

7 represents a gear wheel with which the teeth of the rack bar mesh whenused for imparting rotary motion.

ear 7 drives an ordinary crank shaft. When reciprocating motion isdesired a straight shaft is employed. represents a hollow piston dividedtransversely into two chambers 9, 10. Chamber 9 being the pas- 2represents the .sagewa'y for the induction pipe 11-to the o posite sidesof the piston head for driving t e same, which is alternatelyaccomplished by means of the inlet valve 12.

represents the exhaust chamber which is controlled by the exhaust valve14, to be hereinafter described.

21 represents an exhaust pipe leading into the chamber 10 of the piston5 and adapted to telescope into apipe 22 secured to the piston head 23..24 represents a pipe similar 1 to pipe 22 likewise secured into the head23 for receiving the induction pipe 11. These pipes 24, are stationaryand at their free ends are provided with coupling means to suitablyconnect the same to a service pipe and waste pipe respectively.

As both the inlet and exhaust valves-are to 7 be tripped automaticallyby devices mounted in the cylinder head, it is necessary that thesetripping devices be positive and-durable and so arranged thatshouldforeign substance, such as mud and other impurities, be'

found in the driving fluid,-such' as water, which is usually employed,the tripping instrumentalities will not be clogged or interfered with inaction. Again, as accidents are apt to occur in an automatic motor, itis so important that the trips should be easily and qulckly got at andrepaired or renewed without taking the motor apart. With my device suchchanges or renewals ma be quickly effected by simply cutting 0 drivingfluid and taking off the screw caps protecting the trips. I accomplishthis re- .sult in the following manner :13 represents the trips whichactuate the inlet valve 12 at either end. of the piston to admit thefluid pressure into that end of the cylinder to which said tri isattached. 15 represents the trips whicli in like-manner actuate theexhaust valve 14 for allowing the fluid to be exhausted in advance ofthe driving action of the piston. It is also very desirable to have thetrips yield' so as to revent any jar upon the valve chamber and valve,and at once return to normal position. It is also desirable to adjustthe projection of the trip into the cylinder to the proper position, aswell as to renew the parts when worn- 1 accomplish these results in thefollowing manner:18 represents cylindrical chambers upon the outside endof the cylinder head for supportin the trips which actuate the inletvalve. 19 represents a coil spring around the trip rod, one end of whichseats against a shoulder 17, and the other end against the hollow cap 20into which the trip projects. The tension of the spring can be readilyregulated in this manner, or as occathe 5 sion requires it. The springis thoroughly protected and held in position for use and readilyaccessible without taking the cylinder and piston apart. Duplicate meansare employed for tripping the exhaust valve, likewise formed in thecylinder heads in which 25 represents a shoulder-formedon the trips 15,said tri s projecting into the chambersj26 formed in t e cylinder heads.coil spring imparting tension to the trips and '28 represents a cap forsecuring the spring and trips in position. It will be seen that the caps20, 28, are bored t'o-receive one end of the iston and 32 representslocking rings screw t readed on the periphery of the piston for securelyholding the, cup packings in position.

I have found by experience that the 0011- I 27 represents a structionherein shown is simple, effective and durable, and the motor can bereadily adjusted to varying requirements according to the conditionsunder which it isto be operated. 1

Having described my invention, I claim In a water motor, a cylinder, apiston having supply-and exhaust com artments, supply and exhaust pi escarrie by said piston and leading into t eir respective compartments,supply. and exhaust valves in said piston compartment, said su plyandexhaust pipes lying arallel'with eac 1 other, cylinder heads detac ablyconnected to said cylinder,

sleeve projections extending from said head provided with differentialdiameter bores, a

ollow cap detachably secured to said sleeve projections, a springactuated plunger trip rod slidably mounted within said caps and smallerbores of said head and pro ecting into the cylinder ina position to tripthe valves at the op osite ends ofthe piston stroke, substantia lyasdescribed.

In testimony whereof, I have hereunto-set my hand.

' JOHN B. FLETCHER' Witnesses:

()LIV Eli B. KAISER.

Luisa BECK.

